CN102435261B - For determining measurement mechanism and the method for the liquid level in fuel tank - Google Patents
For determining measurement mechanism and the method for the liquid level in fuel tank Download PDFInfo
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- CN102435261B CN102435261B CN201110270085.1A CN201110270085A CN102435261B CN 102435261 B CN102435261 B CN 102435261B CN 201110270085 A CN201110270085 A CN 201110270085A CN 102435261 B CN102435261 B CN 102435261B
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- fuel tank
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- generating unit
- distortion
- measurement mechanism
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/20—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow
- G01F1/32—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow using swirl flowmeters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
- G01F23/32—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements
- G01F23/36—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements using electrically actuated indicating means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
- G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
- G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
- G01F1/363—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction with electrical or electro-mechanical indication
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F22/00—Methods or apparatus for measuring volume of fluids or fluent solid material, not otherwise provided for
- G01F22/02—Methods or apparatus for measuring volume of fluids or fluent solid material, not otherwise provided for involving measurement of pressure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/80—Arrangements for signal processing
- G01F23/802—Particular electronic circuits for digital processing equipment
- G01F23/804—Particular electronic circuits for digital processing equipment containing circuits handling parameters other than liquid level
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/20—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of apparatus for measuring liquid level
Abstract
The present invention relates to a kind of for determining the measurement mechanism (12) of the liquid level (14) in vehicle fuel tank (10).At this, buoyancy aid (18) can be exchanged into a signal relative to the position of the signal generating unit (22) that can be fixed on fuel tank (10), and described signal is associated with the material level (14) of undeformed fuel tank (10).Correcting device (48,54,56) is designed for the distortion of detection fuel tank (10) and revises described signal.In addition, the invention still further relates to one for determining the method for the liquid level (14) in vehicle fuel tank (10).
Description
Technical field
The present invention relates to a kind of measurement mechanism for determining the liquid level in vehicle fuel tank.This measurement mechanism comprises buoyancy aid and can be fixed on the signal generating unit on fuel tank.At this, buoyancy aid can be exchanged into signal relative to the position of signal generating unit, and this signal is associated with the material level of undeformed fuel tank.In addition, the invention still further relates to a kind of method for determining the liquid level in fuel tank.
Background technology
DE 44 26 686 A1 describes a kind of apparatus for measuring charge level for motor fuel tank, on fuel tank, be wherein fixed with the keeper for pot/partial pressure gauge.Potentiometric resistance track is arranged on lever arm, and this lever arm is fixed on for potentiometric keeper in the mode that can swing around an axis of swing.Buoyancy aid and the slider contacted with resistance track are arranged on potentiometric float arm.When angle between float arm and lever arm changes, the resistance value measured on the resistance track by slider can be changed, and this resistance value is called, to illustrate the material level of fuel tank on the indicator.Float arm equally with can around one axis of swing swing mode be fixed on lever arm, wherein the axis of swing of lever arm and the axis of swing of float arm parallel to each other.Therefore, when keeper tilts, lever arm and float arm all change about the relative position of keeper.Therefore, in fuel tank, the change of liquid level causes the angle change between float arm and lever arm.At this, due to the material level instruction that the traveling on descending section or the inclination of keeper that causes due to the distortion of fuel tank must not lead to errors.
DE 39 26 552 C2 describes a kind of level sensor according to potentiometric mode work equally.At this, level sensor is fixed in tank flange, and wherein sensor unit is directed in the housing of level sensor when there is gap by the contact pin intersected at a right angle.Cramp bar passes through the opening of described lower housing portion, and this housing is bearing on the bottom of fuel tank with being spring loaded.This cramp bar can move when there is gap equally in the opening.When tank flange is fixed on fuel tank when there is angular deviation with its normal place, this angular deviation can be compensated relative to the relative motion of level sensor housing by contact pin and cramp bar.Therefore the installation according to normal place do not carried out of flange on fuel tank can not have an impact to the measuring accuracy of level sensor.
But, in the measurement mechanism known by prior art, due to the distortion of fuel tank or cause due to the canting of measurement mechanism parts, material level instruction that buoyancy aid still can lead to errors relative to the disadvantageous especially relative position of signal generating unit.
In addition, concerning wherein buoyancy aid not with the measurement mechanism of the signal generating unit mechanical attachment be fixed on fuel tank, there will be the distortion of fuel tank, this distortion result in the inaccurate instruction to liquid level in fuel tank.
Summary of the invention
Therefore, the object of the invention is to, provide the measurement mechanism of aforementioned type and corresponding method, this measurement mechanism or method improve the determination to liquid level in fuel tank.
This object is realized with the method for the feature with claim 11 by the measurement mechanism with the feature of claim 1.Provide favourable design proposal in the dependent claims together with rational improvement project.
Measurement mechanism according to the present invention comprises one for the correcting device of corrected signal, and wherein said correcting device is designed for the distortion detecting fuel tank.The present invention is based on such cognition, and signal that namely produced by signal generating unit, that be associated with the material level of undeformed fuel tank can cause the material level of the actual material level of substantial deviation to indicate due to the distortion of fuel tank.When fuel tank be designed to forbay, namely airtight, not by (being usually equipped with charcoal filter) often open (
during the case of offene) ventilating duct and environment, situation is especially true.
But, even if for the situation by this fuel tank being equipped with the pipeline of charcoal filter to be connected with surrounding environment, the negative pressure relative to the small degree of environmental pressure or overvoltage also can be there is in the inside of fuel tank due to temperature variation.
But for airtight forbay, the distortion particular importance of the fuel tank come with negative pressure or overvoltage, therefore especially advantageously can detect the distortion of fuel tank and corrected signal by means of correcting device here.
The liquid level in fuel tank can be determined with improvement when considering fuel tank deformation according to measurement mechanism of the present invention--such as by use one signal generating unit, wherein buoyancy aid and this signal generating unit mechanical attachment.But this measurement mechanism also can with in such a system, namely within the system buoyancy aid the signal generating unit remained on regularly on fuel tank interacts with position in a contactless manner.This signal generating unit especially can be the measurement circuit board (Messplatine) with reed switch or the electrode changed by the motion Detection capacitance of buoyancy aid.
Now, by the signal of corrected signal generating unit, can abandon those both expensive as known from the prior art, for supporting the layout measure of signal generating unit parts in the mode compensating distortion.
Based on the distortion of measured fuel tank the correction that signal does reliably prevented and the mistake of liquid level is indicated.If described fuel tank is arranged in vehicle, then can advantageously stop, vehicle stops because in esse fuel is only enough in the operating range shorter than the illusion obtained according to bin level indicator.
In a kind of favourable design proposal of the present invention, to the degree or of described distortion, correcting device is designed for determines that the amount of this (distortion) degree is measured.Can especially accurately compensate the distortion caused due to the distortion of fuel tank of the signal produced by signal generating unit like this.
Measurement mechanism can comprise one for controlling the control device of an indicator, wherein in this control device, store at least one characteristic curve, this characteristic curve provides at least one and depends on the signal of the modified value of fuel tank deformation size in order to corrected signal generating unit.Control device can call this characteristic curve in order to signal generating unit, the signal that not indicate actual liquid level due to the distortion of fuel tank revises.In this measurement mechanism, do not need to do any change to signal generating unit, because herein is provided simply to the possibility of existing measurement mechanism repacking renovation.
In another favourable design proposal of the present invention, correcting device comprises at least one pressure transducer in order to detect the vapor pressure in fuel tank.The size of the distortion based on pressure of fuel tank can be inferred by the vapor pressure in fuel tank.Pressure transducer especially can be used in such fuel tank, namely in this fuel tank, departs from the remarkable distortion that result in fuel tank, such as, in the fuel tank be made up of plastics/synthetic material from normal pressure.But, even if in the fuel tank be made up of metal, especially steel, the information relevant based on the distortion of pressure with fuel tank also can be obtained by the vapor pressure detected in fuel tank.The described distortion based on pressure can specifically for the type of each fuel tank that is obtain according to material, nominal volume and shape.
Shown advantageously, at least one pressure transducer described to be arranged in fuel tank and to be connected with control device.In control device to produced by signal generating unit and do not indicate the signal of actual liquid level due to the distortion of fuel tank and the signal provided by pressure transducer processed.Especially, when being natively provided with pressure transducer to monitor the pressure in fuel tank, the signal that can call especially is simply provided by pressure transducer revises the signal provided by signal generating unit.For this reason, only need store in control device specifically for the characteristic curve of fuel tank type and control device is designed for the described two kinds of signals of process.
Addedly or alternatively, at least one pressure transducer described can be integrated in signal generating unit or in buoyancy aid--or also can be integrated into connect signal generating unit and buoyancy aid connection element in.At this, can by means of signal generating unit by the signal path of signal generating unit the signal transmission through revising to control device.So not need in control device design Storage for the characteristic curve of corrected signal, this is because by signal generating unit directly by by means of the signal transmission of pressure transducer correction to control device.This pressure transducer can comprise--being such as arranged on buoyancy aid or on signal generating unit--film, the skew based on pressure of this film provides the measured value of the signal that a correction is produced by signal generating unit.At this, control device does not need to carry out analyzing and processing to two kinds of signals, but can directly change the signal be provided, to control the indicator being used to indicate liquid level.In this design proposal of the present invention, do not need in order to ensure the correct control to indicator and any change is carried out to the control device of the signal being only designed for processing signals generating unit.
Advantageously, correcting device can comprise at least one for detecting the temperature sensor of the temperature of fuel tank.Can the material expansion caused by temperature and contraction be included in consideration thus.When fuel tank is made by plastics/synthetic material and had the expansion coefficient larger than steel fuel tank, this is especially favourable.
When going back serviceability temperature sensor except the pressure transducer of correcting device, the characteristic curve be stored in control device can include two values, pressure and temperatures in consideration when providing the modified value for the signal of corrected signal generating unit.
When correcting device comprises at least one displacement transducer to detect length variations, then can include the practical distortion of fuel tank in consideration particularly well.At this, whether distortion is caused by pressure and/or temperature is inessential.Here, a characteristic curve be stored in control device also can consider length variations when providing the modified value for the signal of corrected signal generating unit.Also at least one displacement transducer can be also set except the pressure transducer of correcting device and/or temperature sensor.
When at least one displacement transducer connects with the wall portion of fuel tank with signal generating unit, another aspect on the one hand, also from the normal place different physical location of signal generating unit in fuel tank can be detected, and include this physical location in consideration when the signal of corrected signal generating unit.At this, whether measured physical location depends on whether be under pressure load and/or temperature load of fuel tank is inessential.On the contrary, also can detect and process the canting of measurement mechanism parts or the distortion based on mechanical load.
Finally shown advantageously, when causing the distortion of fuel tank due to overvoltage and/or negative pressure, correcting device is designed for revises described signal.Therefore, can consider that fuel tank there will be the situation of the distortion different from during overvoltage when negative pressure.When negative pressure, the pressure in fuel tank can be lower than environmental pressure up to 100mbar, and when overvoltage, the pressure in fuel tank can higher than environmental pressure up to 300mbar.
In the method for determining the liquid level in vehicle fuel tank according to the present invention, signal generating unit sends the signal of an instruction liquid level.At this, the distortion of fuel tank is detected and revises this signal based on measured distortion.It is hereby ensured, the actual liquid level distortion indicated can not be made because of the distortion of fuel tank.Especially can be detected by correcting device and revise the distortion of fuel tank.
Also be applicable to according to the method for determining liquid level of the present invention for the advantage described by measurement mechanism according to the present invention and preferred implementing form.
The characteristic sum Feature Combination mentioned in explanation above and mention in the description of accompanying drawing subsequently and/or only characteristic sum Feature Combination illustrated in the accompanying drawings can not only with combinationally using of providing respectively, and can combinationally use with other or be used alone, and do not depart from framework of the present invention.
Accompanying drawing explanation
Other advantage of the present invention, characteristic sum details is obtained by claim, below description related to the preferred embodiment and by accompanying drawing.Accompanying drawing illustrates:
Fig. 1 schematically shows the undeformed vehicle fuel tank with level-sensing device, and wherein the float of fuel tank is connected with signal generator by an arm;
Fig. 2 schematically shows the distortion caused by negative pressure of fuel tank, and wherein said arm changes due to distortion relative to the Angle Position of signal generator;
Fig. 3 schematically shows the change of the Angle Position of described arm, and this change is caused by the distortion based on the overvoltage in fuel tank;
Fig. 4 illustrates the change of the Angle Position of described arm, and wherein due to the change of pressure in fuel tank, this fuel tank deforms, and therefore the position of signal generator is departed from from its normal place; And
Fig. 5 illustrates height-volume characteristic curve, this height-volume characteristic curve provides the corresponding relation of existing volume of fuel in the filling/work loading height and fuel tank provided by signal generator, wherein so revise actual curve, this actual curve and theoretical curve are matched.
Embodiment
Fig. 1 schematically shows fuel tank 10 and the measurement mechanism 12 for the material level 14 of determining fuel 16 in fuel tank 10.Fuel tank 10 is designed to the forbay of vehicle, namely airtight case, and this case is not connected with the surrounding environment of fuel tank 10 by the ventilating duct often opened.This forbay especially can be used in hybrid electric vehicle.In hybrid electric vehicle, when the internal combustion engine of motor vehicle long period do not work and therefore fuel vapour is not removed by its burning in internal combustion engine time, fuel gas also should be stoped to be elected in environment.This forbay can be especially advantageously made up of plastics/synthetic material.
Measurement mechanism 12 comprises the buoyancy aid 18 floated on fuel 16, and this buoyancy aid 18 is connected with signal generator 22 by an arm 20.Arm 20 relative to signal generator 22 the change along with material level 14 in fuel tank 10 and the Angle Position changed is converted into electric signal, such as resistance value.For the situation of undeformed fuel tank 10, this resistance value indicates in fuel tank 10 have how much fuel 16.
One is provided by as theoretical curve 24 in Figure 5 in a coordinate system for the corresponding characteristic curve of undeformed fuel tank 10, wherein on ordinate 26, provide packed height, and on horizontal ordinate 28, provide the actual filling/stocking volume of fuel 16 in fuel tank 10.Packed height for demonstrating (absolute or relative) instruction volume or operating distance on the fuel tank indicator of vehicle.
For this reason, signal generator 22 by signal path 30 electrical signal transfer to controller 32, as illustrated by arrow 34 in FIG, (unshowned) fuel tank indicator in the combination instrument of this controller controller motor-car again then.
Signal generator 22 is arranged on supply unit 36, and this supply unit is bearing on the bottom 38 of fuel tank 10 in spring-loaded mode by one (unshowned) supporting member.Pipeline 40 from supply unit 36 through tank flange 42 from fuel tank 10 out and pass to vehicle (unshowned) internal combustion engine.
Fig. 2 illustrates in fuel tank 10 to be situation that negative pressure, fuel tank 10 are out of shape due to this negative pressure.The distortion of the wall portion 44 of fuel tank 10 causes, and arm 20 is different from the situation in undeformed fuel tank 10 relative to the Angle Position of signal generator 22.Therefore, when fuel tank 10 is caused distortion by negative pressure, according to the first form of implementation, signal generator 22 corresponds to signal transmission than the large packed height when undeformed fuel tank 10 to controller 32 by one.This relation of shown packed height and actual packing volume is illustrated by actual curve 46 in Figure 5.
At this, pressure transducer 48 records the vapor pressure in fuel tank 10 and is passed to controller 32.Controller 32 processes the signal sent by signal generator 22 and the signal that sent by pressure transducer 48, and wherein have characteristic curve in controller 32, this characteristic curve provides the modified value relevant with the size of the distortion of fuel tank 10.Several examples of this modified value are exemplarily shown by arrow 50 in Figure 5.Value on actual curve 46 has been corrected corresponding modified value, and therefore the trend of actual curve 46 and theoretical curve 24 match (angleichen).
For the fuel tank 10 (see Fig. 2) being caused distortion by negative pressure, depending on the shape of fuel tank 10 and if desired depending on the installation site of signal generator 22, the signal produced by signal generator 22 may provide the packed height lower than actual packed height.Exemplarily provide corresponding actual curve 52 in Figure 5.At this, the modified value corresponding to arrow 50 also makes actual curve 52 and theoretical curve 24 match.
Fig. 3 overvoltage described in fuel tank 10 causes the situation of fuel tank deformation.This causes again arm 20 to be converted to the packed height lower than the packed height be in fact present in fuel tank 10 relative to the Angle Position of signal generator 22 by signal generator 22.Similarly, the example of the mutual relationship between this shown packed height and corresponding packing volume is can be used as at the actual curve 52 shown in Fig. 5.
For the situation of this distortion caused due to overvoltage, the modified value provided by pressure transducer 48 is responsible for making controller 32 control fuel tank indicator exactly.Namely to the corresponding modified value of value correction on actual curve 52, and actual curve 52 and theoretical curve 24 therefore can be made to match according to corresponding, storage characteristic curve in controller 32 by means of the signal being supplied to controller 32 by pressure transducer 48.
Finally, the distortion caused by pressure that Fig. 4 describes fuel tank 10 causes supply unit 36 and then is fixed on the situation of the signal generator 22 on supply unit 36 relative to arm 20 canting.Here also achieve pressure transducer 48 to be sent to by signal generator 22 controller signal correction and and then achieve material level through revise instruction.
In an alternative versions, pressure transducer can be arranged on buoyancy aid 18 or on signal generator 22.Advantageously, this pressure transducer is connected with controller 32 by signal path 30.So just achieve: the electric signal being sent to controller 32 by signal generator 22 was corrected before arrival controller 32.Also not only can be provided with the pressure transducer 48 be arranged in fuel tank but also be provided with the pressure transducer connected with controller 32 by signal path 30.
In addition, be preferably provided with temperature sensor 54, it connects with controller 32 equally.So the modified value revised each actual curve 46,52 by the pressure signal transmitted by pressure transducer 48 and being determined by the temperature signal recorded by temperature sensor 54 here.In optional form of implementation, temperature sensor 54 also can be arranged in buoyancy aid 18 or on signal generator 22 or on arm 20, and be responsible for via signal path 30 transmit through revise signal to controller 32.
Additionally or alternatively, can be provided with displacement transducer 56, this displacement transducer obtains the length variations of the wall portion 44 of fuel tank 10 and corresponding measured value is passed to controller 32.Then, controller 32 is converted to described measured value the corresponding modified value that the value of actual curve 46,52 and theoretical curve 24 are matched.The corresponding characteristic curve can revised according to arrow 50 pairs of actual curves 46,52 provides and is out of shape relevant modified value, and this modified value is that various types of fuel tank 10 is determined.Store this characteristic curve in controller 32.
When connecting with the wall portion 44 of fuel tank according to this displacement transducer 56 1 of another form of implementation aspect, connecting with signal generator 22 or supply unit 36 on the other hand, also can the canting of supply unit 36 be included in consideration (see Fig. 4), even if this canting is not caused by the pressure surge in fuel tank 10 or temperature fluctuation when being controlled fuel tank indicator by controller 32.
Claims (7)
1. one kind for determining the measurement mechanism of the liquid level (14) in vehicle fuel tank (10), described measurement mechanism has buoyancy aid (18) and can be fixed on the signal generating unit (22) on described fuel tank (10), wherein said buoyancy aid (18) can be converted to a signal relative to the position of described signal generating unit (22), described signal is associated with the material level (14) of undeformed fuel tank (10), wherein, be provided with the correcting device (48 for revising described signal, 54, 56), described correcting device is designed for the distortion detecting described fuel tank (10),
It is characterized in that,
To the degree or of described distortion, described correcting device (48,54,56) is designed for determines that the amount of this deformation extent detects, and comprise at least one pressure transducer (48) for the vapor pressure detected in described fuel tank (10), at least one temperature sensor (54) for detecting the temperature of described fuel tank (10) and at least one displacement transducer (56) for detection length variations.
2. measurement mechanism according to claim 1, it is characterized in that, be provided with the control device (32) for controlling an indicator, wherein said control device has at least one characteristic curve in (32), and described characteristic curve provides at least one modified value relevant with the distortion size of described fuel tank (10) for the described signal revising described signal generating unit (22).
3. measurement mechanism according to claim 2, is characterized in that, described at least one pressure transducer (48) to be arranged in described fuel tank (10) and to connect with described control device (32).
4. measurement mechanism according to claim 2, it is characterized in that, described at least one pressure transducer (48) is integrated in described signal generating unit (22) or in described buoyancy aid (18), wherein by means of described signal generating unit (22) by the signal path of described signal generating unit (22) the Signal transmissions through revising to described control device (32).
5. measurement mechanism according to claim 1, it is characterized in that, at least one displacement transducer (56) is connected with the wall portion (44) of described fuel tank (10) with described signal generating unit (22), another aspect on the one hand.
6. measurement mechanism according to any one of claim 1 to 5, it is characterized in that, described correcting device (48,54,56) is designed for be revised described signal when described fuel tank (10) deforms due to overvoltage and/or negative pressure.
7. one kind for determining the method for the liquid level (14) in vehicle fuel tank (10), wherein signal generating unit (22) sends the signal of the described liquid level of an instruction (14), wherein, detect by correcting device (48,54, the 56) distortion to described fuel tank (10) and revise described signal based on the distortion recorded
It is characterized in that,
To the degree or of described distortion, described correcting device (48,54,56) is designed for determines that the amount of this deformation extent detects, and comprise at least one pressure transducer (48) for the vapor pressure detected in described fuel tank (10), at least one temperature sensor (54) for detecting the temperature of described fuel tank (10) and at least one displacement transducer (56) for detection length variations.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010045212.2 | 2010-09-13 | ||
| DE102010045212A DE102010045212A1 (en) | 2010-09-13 | 2010-09-13 | Measuring device and method for determining a liquid level in a fuel tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102435261A CN102435261A (en) | 2012-05-02 |
| CN102435261B true CN102435261B (en) | 2015-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110270085.1A Expired - Fee Related CN102435261B (en) | 2010-09-13 | 2011-09-13 | For determining measurement mechanism and the method for the liquid level in fuel tank |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US9360353B2 (en) |
| EP (1) | EP2437036B1 (en) |
| CN (1) | CN102435261B (en) |
| DE (1) | DE102010045212A1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| US20120234074A1 (en) | 2012-09-20 |
| US9360353B2 (en) | 2016-06-07 |
| DE102010045212A1 (en) | 2012-03-15 |
| CN102435261A (en) | 2012-05-02 |
| EP2437036B1 (en) | 2016-02-10 |
| EP2437036A1 (en) | 2012-04-04 |
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